# std::ranges::greater

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< cpp‎ | utility‎ | functional

Defined in header `<functional>` |  |
struct greater; |  | (since C++20)

Function object for performing comparisons. Deduces the parameter types of the function call operator from the arguments (but not the return type).

### Nested types

Nested type | Definition
`is_transparent` | unspecified

### Member functions

operator() | checks if the first argument is greater than the second (public member function)

## std::ranges::greater::operator()

template< class T, class U > constexpr bool operator()( T&& t, U&& u ) const; |  |

Equivalent to return ranges::less{}(std::forward<U>(u), std::forward<T>(t));.

This overload participates in overload resolution only if std::totally_ordered_with<T, U> is satisfied.

### Notes

Unlike std::greater, `std::ranges::greater` requires all six comparison operators `<`, `<=`, `>`, `>=`, `==` and `!=` to be valid (via the `totally_ordered_with` constraint) and is entirely defined in terms of std::ranges::less.

### Example

| This section is incomplete Reason: no example

### Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR | Applied to | Behavior as published | Correct behavior
--- | --- | --- | ---
LWG 3530 | C++20 | syntactic checks were relaxed while comparing pointers | only semantic requirements are relaxed

### See also

greater | function object implementing x > y (class template)

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